RC to RS232 switch

I am attempting to set up a autonomous system with RC control as an emergency back up. I have figured out how to switch from RS232 mode to RC control
&gt;^00 01
&gt;%rrrrrr
I then see the expected ASCII output string updating the status of the parameter set, but I can not get my AX2550 to respond to either a new command mode, or the ten return carriages to reset the controller to RS232 mode from RC.
Ideally I would like to have a default setting of either RC or RS232, then switch to the other when desired, and then reset the controller to return to the default setting. Is there a way to do this?